Let \(M\)  be a complex manifold of complex dimension \(n\)  with trivial canonical bundle \(K_M = {\rm det}(T^{(1,0)}M)^*\) , and let \(\Omega \)  be a nowhere vanishing holomorphic \((n,0)\) -form.
The Type IIB flow is the flow of \((n-1,n-1)\) -forms defined as follows [1]}
\(\partial _t(\Vert \Omega \Vert _\eta \eta ^{n-1}) = i\partial \overline{\partial }\eta ^{n-2}.\) 
